The liner adaptor is manufactured from 316 grade stainless steel. The adaptor is used to connect flexible chimney liner to the flue pipe at the base of the flue. You can see that on the top of the adaptor their are two skins and the liner connects between these two skins. The inner skin is slightly longer to prevent snagging and reduce strain on this joint when sweeping.

The increaser adaptor is very similar to the standard liner adaptor. It is used to connect the flexible chimney liner to a 1" smaller diameter flue pipe at the base of the flue. You can see that on the top of the adaptor their are two skins and the liner connects between these two skins. The inner skin is slightly longer to prevent snagging and reduce strain on this joint when sweeping.

To connect the liner to the adaptor, you will require some stainless steel self tapping screws. Drill some pilot holes through the outer skin of the adaptor and secure the liner in place. Complete the joint by sealing between the liner and outer skin of the adaptor with fire cement.

On the inner of the adaptor there is a hole. This allows any moisture running down the inside of the liner to drain. The idea is that all moisture and deposits stay on the inside of the completed installation.